Method of operating, via a block mode terminal, UNIX programs fo

Details Method of operating, via a block mode terminal, UNIX programs fo Method of operating, via a block mode terminal, UNIX programs fo

1993-01-29

1994-11-01

Lall, Parshotam S.

395155, G06F 300

Patent

active

053613449

ABSTRACT:
An emulator enables a UNIX program to operate with a block mode terminal, even though the UNIX program is designed to operate with a character mode terminal. Initially, the emulator receives from the UNIX program, a UNIX output sequence of characters which produces a display on a video screen in the character mode terminal. Then the emulator converts the UNIX output sequence of characters into an input sequence of characters for the block mode terminal which there produces an emulated display and which protects the emulated display from operator alteration except for certain fields. Thereafter, the block mode terminal transmits a response character sequence which includes data characters written by an operator into the unprotected fields and no characters from the protected portions of the display. Then the emulator generates a UNIX input character sequence from the terminal response character sequence in which the data characters are repeated and in which, for any empty field, a control character is included that identifies a key in the character mode terminal by which the field is skipped.

REFERENCES:
patent: 4463442 (1984-07-01), Dachowski et al.
patent: 4574362 (1986-03-01), Spindel et al.
patent: 4733351 (1988-03-01), Peirent
patent: 5036484 (1991-07-01), McCoy et al.
patent: 5173854 (1992-12-01), Kaufman et al.
patent: 5197124 (1993-03-01), Busboom et al.

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